In Guzman v. 560 Realty Co. (175 Misc 2d 969, 670 NYS2d 1014 [1998], ownership of the building changed while the infant resided in the building. Initially, plaintiff named only the new owner as a party defendant but then sought leave to serve an amended complaint upon the original owner alleging a cause of action that accrued during that landlord's ownership of the building, despite the fact that the first elevated blood level was not documented until several years after the change in ownership.